What actions specifically trigger the 10 turns peace treaty.
Also, in a recent game I traded a Defensive Pact with another Civ and as I recall within just a couple of turns they declared war on me. Does that sound right?
I've had that happen to. Sometimes a nutcase will sign a defensive pact at pleased, stay pleased and attack. I almost think that the decision to sign a defensive pact is separate from the decision to attack you. It's like when he declares war on you, the AP vote comes up next turn and he votes to stop the war he's involved it.